The cardiac training effect of selected college men as measured by three heart rate intensity levels based on resting and maximum heart rates

The purpose of this investigation was to study the cardiac training effect of three heart rate intensities based on the percentages within the range of resting and maximum heart rates. It was designed to focus additional light on the amount of cardiac stress needed to cause the "training effect" to occur and the amount of work needed to achieve a physiological change as noted by the decrease in resting heart rate. The subjects were 12 dependable college males who would complete the six weeks exercise program. The resting heart rate was obtained by attaching electrodes to the manubrium sterni and monitoring the subjects' resting heart rate after they rested a minimum of 30 minutes in a supine position. A maximum heart rate was also obtained by monitoring the heart rate as each subject ran on a treadmill at 7 mph and 0 per cent grade. The speed remained constant but the grade increased 2 1/2 per cent after each minute of exercise until exhaustion. The 50, 60 and 70 per cent heart rate intensity levels were determined from the range between the resting and maximum heart rates